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在直角坐标系xOy中，曲线C1的参数方程为（α为参数）M是C1上的动点，P点满足＝2，P点的轨迹为曲线C2 （Ⅰ）求C2的方程； （Ⅱ）在以O为极点，x轴的正半轴为极轴的极坐标系中，射线θ＝与C...
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高三下学期数学《》真题及答案
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在直角坐标系xOy中已知曲线C的参数方程是θ是参数若以O为极点x轴的正半轴为极轴取与直角坐标系中相同
在直角坐标系xOy中以原点O.为极点x轴的正半轴为极轴建立极坐标系.曲线C.1的参数方程为t为参数曲
在平面直角坐标系xOy中直线m的参数方程为t为参数在以O.为极点射线Ox为极轴的极坐标系中曲线C.的
在平面直角坐标系xoy中曲线C1的参数方程为θ为参数以坐标原点O.为极点x轴的正半轴为极轴与直角坐标
选修4—4坐标系与参数方程 在直线坐标系xOy中曲线C1的参数方程为t为参数a＞0在以坐标原点为极
在直角坐标系xOy中直线l的参数方程为t为参数在以O.为极点x轴的非负半轴为极轴建立的极坐标系中曲线
在直角坐标系xOy中曲线C.1的参数方程为α为参数在极坐标系与直角坐标系xOy取相同的长度单位且以原
选修4-4坐标系与参数方程 在直角坐标系xOy中曲线C1的参数方程为以坐标原点为极点以x轴的正半轴
在直角坐标系xOy中过点P.21的直线l的参数方程为t为参数以坐标原点为极点x轴正半轴为极轴建立极坐
选修4—4坐标系与参数方程 在直线坐标系xOy中曲线C1的参数方程为t为参数a＞0在以坐标原点为极
在平面直角坐标系xOy中直线m的参数方程为t为参数在以O.为极点射线Ox为极轴的极坐标系中曲线C.的
在平面直角坐标系xOy中直线l的参数方程为t为参数曲线C.的参数方程为θ为参数.试求直线l和曲线C.
在直角坐标系xOy中曲线M.的参数方程为α为参数若以直角坐标系中的原点O.为极点x轴的正半轴为极轴建
在直角坐标系xOy中曲线C.1的参数方程为t为参数以原点为极点以x轴为正半轴为极轴建立极坐标系曲线C
在平面直角坐标系xOy中直线l的参数方程为t为参数曲线C.的参数方程为θ为参数.试求直线l和曲线C.
选修4—4坐标系与参数方程 在直线坐标系xOy中曲线C1的参数方程为α为参数以坐标原点为极点x轴正
在平面直角坐标系xOy中直线l的参数方程为t为参数曲线C.的参数方程为θ为参数试求直线l与曲线C.的
在平面直角坐标系xoy中已知曲线C.的参数方程为α为参数现以O.为极点x轴的正半轴为极轴建立极坐标系
在直角坐标系xOy中以原点O.为极点x轴的正半轴为极轴建立极坐标系.曲线C.1的参数方程为t为参数曲
在直角坐标系xOy中直线l经过点P-10其倾斜角为α以原点O.为极点以x轴非负半轴为极轴与直角坐标系
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Isthereanyonefatherisahistoryteacherinyourclass? A.whose B.who's C.which D.whom
ItravelalotandIfindoutdifferentstyles风格ofdirectionseverytimeIaskHowcanIgettothepostoffice? TheforeigntouristsareoftenconfusedinJapanbecausemoststreetstheredon'thavenames.Peopleuselandmarks地标intheirdirectionsinsteadofstreetnames.ForexampletheJapanesewillsaytotravelersGostraightdowntothecorner.Turnleftatthebighotelandgopastafruitmarket.Thepostofficeisacrossfromthebusstop. InthecountrysideoftheAmericanMidwesttherearenotusuallymanylandmarks.Therearenomountainssothelandisveryflatinmanyplacestherearenotownsorbuildingswithinmiles.Insteadoflandmarkspeoplewilltellyoudirectionsanddistances.InKansasorIowaforexamplepeoplewillsayGonorthtwomiles.Turneastandthengoanothermile. PeopleinLosAngelesCaliforniahavenoideaofdistanceonthemaptheymeasuredistanceintimenotmiles.Howfarawayisthepostoffice?youask.Ohtheyanswerit'saboutfiveminutesfromhere.YousayYesbuthowmanymilesawayisit?Theydon'tknow. It'struethatapersondoesn'tknowtheanswertoyourquestionsometimes.Whathappensinsuchasituation?ANewYorkermightsaySorryIhavenoidea.ButinYucatanMexiconooneanswersIdon'tknowPeopleinYucatanbelievethatIdon'tknowisimpoliteTheyusuallygiveanansweroftenawrongone.AtouristcangetveryverylostinYucatan! 56.WhenatouristaskstheJapanesethewaytoacertainplacetheyusually. A.describetheplacecarefully B.showhimthenamesofthestreets B.tellhimamapoftheplace D.refertorecognizablebuildingsandplaces 57.Whatistheplacewherepeoplemeasuredistanceintime? A.NewYork B.LosAngeles C.Kansas D.Iowa 58.PeopleinYucatanmaygiveatouristawronganswer. A.inordertosavetime B.asatest C.soastobepolite D.forfun 60.Whatcanweinferfromthetext? A.It'simportantfortravelerstounderstandculturaldifferences.. B.It'susefulfortravelerstoknowhowtoaskthewayproperly. C.Peoplehavesimilarunderstandingsofpoliteness. D.NewYorkersaregenerallynothonesttovisitors.
EuropeansshouldtrytostayindoorsifashfromIceland'svolcanostartssettlingtheWorldHealthOrganizationwarnedFridayassmallamountsfellinIcelandScotlandandNorway. WHOspokesmanDanielEpsteinsaidthemicroscopic微小的ashispotentiallydangerousforpeoplewhenitstartstoreachtheEarthbecauseinhaled吸入particlescanenterthelungsandcauserespiratoryproblems.AndhealsosaidEuropeanswhogooutsidemightwanttoconsiderwearingamask. Otherexpertshoweverweren'tconvincedthevolcanicashwouldhaveamajoreffectonpeoples'healthandsaidWHO'swarningswerehysterical.Theysaidvolcanicashwasmuchlessdangerousthancigarettesmokeorpollution.Volcanicashismadeoffineparticlesoffragmentedvolcanicrock.Itislightgraytoblackandcanbeasfineastalcumpowder.Duringavolcaniceruptiontheashcanbebreatheddeepintothelungsandcauseirritationeveninhealthypeople.Butonceitfallsfromagreaterdistance﹣likefromthecloudcurrentlyhoveringaboveEurope﹣itshealtheffectsareoftenminimalexpertssay. NotallparticlesarecreatedequalsaidKenDonaldsonaprofessorofrespiratorytoxicologyattheUniversityofEdinburghInthegreatschemeofthingsvolcanicashisnotallthatharmful.AndhesaidmostEuropeans'exposuretovolcanicashwouldbenegligibleandthatonlythoseintheneardistrictsoftheIcelandicvolcanowouldlikelybeatrisk. Dr.StephenSpiroaprofessorofrespiratorymedicineanddeputychairoftheBritishLungFoundationsaidthefurthertheparticlestravelthelessdangeroustheywillbe.ThecloudhasalreadypassedovernorthernScotlandandwehaven'theardofanyilleffectstherehesaid.Spirosaidtowearmasksorstayindoorstoavoidvolcanicashwasoverthetopandabithysterical. 13.Thetextismainlyabout. A.theeffectofvolcanicash B.thehealthriskofvolcanicash C.thedisadvantagesofvolcanicash D.theopinionsonhealthriskofvolcanicash 14.WhichoneistrueaccordingtoParagraph3? A.Thevolcanicash'seffectsonEuropeanswerelittle. B.Theashcausedirritationeveninhealthypeople. C.OtherexpertsthoughtWTO'Swarningswereuseful. D.Thevolcanicashwasmoredangerousthancigarettesmokeorpollution. 15.Whatcanwelearnfromthepassage? A.Thevolcanicashwouldn'tbeharmfultopeople. B.Allexpertsthoughtthevolcanicashdidgreatharmtoourhealth. C.Peopleclosetothevolcanowouldlikelybeatriskaccordingtosomeexperts. D.EuropeansshouldstayindoorsbecauseIceland'svolcanostartssettling.
山鸡椒是一种在南方分布广泛的野生芳香植物山鸡椒油具有较好的抑菌作用．请回答 1植物芳香油的组成成分主要包括． 2一般采用水气蒸馏法来提取山鸡椒油原因是常选取山鸡椒的新鲜果实和叶片作为提取材料原因是．提取过程中使用无水硫酸钠其作用是． 3为研究山鸡椒油对细菌真菌的抑制作用及热处理对山鸡椒油作用的影响进行了相关实验研究结果如表． ①本实验的自变量是． ②本实验得到的结论有． 4若对实验所用样品中的酵母菌含量进行测定可将1mL样液稀释100倍在3个平板上分别接入0.1mL稀释液并均匀涂布经适当培养后平板上的菌落数分别是323436．据此可得出每升样品中的活菌数为实验中采用的接种方法是．
某生物兴趣小组调查了某块果树草菇间种试验田的基本成分和能量单位×107kJ流动情况．请回答下列问题 表生态系统主要成分 1果树和草菇间种有利于提高群落空间结构中结构的复杂性．与单种相比间种可以增加果园生态系统的稳定性． 2卷叶蛾和蝽象是果树的主要害虫之一请写出一种对果树害虫的生物防治方法． 3第二营养级能够从该生态系统获得的能量最多为×107kJ． 4无论是单种还是间种从能量流动角度分析栽种密度过低导致产量较低的原因是而栽种密度过高也会导致产量偏低的原因是所以需要合理密植．
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Flowersarebelievedasthegreatestmessengersoflove.Theyarewidelyusedallovertheworldtorepresentloveandcare.Flowersareawonderfulcreationofnature.Theycanshowtheuniquepersonalityofamother.Soyoucanshowyourlovewiththehelpoftheseflowers.YoucangivebeautifulflowerstoyourmotheronMother'sDay. Amotherisawomanthathasendlessloveforherchildrenandtheloveisselfless.Infactsheisbornakindperson.Sheisoneofthemostimportantpeopleinyourlife.Sotoshowyourloveforyourmotheryoucangivebeautifulflowerstoheronthisbigday. Youcaneasilyfindlotsofdifferenttypesofflowersinmanydifferentcolors.Thebestchoiceforamotheriscarnations康乃馨especiallytheredyellowandpinkones.Youdon'tneedtogiveherrosesonMother'sDay.Youcangiveherabouquet花束ofanothertypeofflowerinstead.Thesmellandstyleoftheflowerarrangementthatyougivewillshowyourlove. Somepeopleliketobuyflowersearlyandkeeptheminthefridgeforfurtheruse.Thisisnotawiseidea.Inthiswayflowerslosetheirfreshness.Itisbettertobuyafreshbouquetanddeliver递送itassoonaspossible.Alwaystrytomakeyourpurchaseattherighttime.Inadditionifyourmotherisnotnearyouandyouwanttosendhersomeflowersthenyoucanuseanonlineservice.ThereareMother'sDayflowerdeliveryservicesallaroundtheworld. GiveFlowerstoYourMotheronMother'sDay Meaningsofflowers ▲thegreatestmessengersoflove. ▲awonderfulcreationofnature 71forgivingflowers ▲Flowersstandforloveandcare. ▲Flowers72theuniquepersonalityofamother. ▲Themother'sloveis73andselfless. ▲Mothersare74toyou. ▲Givingbeautifulflowerstoyourmotherisawayto75. 76ongivingflowerstoyourmother ▲Redyellowandpinkcarnationsarethebest77.▲Youcansendabouquetofdifferentflowersinstead. ▲Youshouldbuy78flowersanddeliverthemquickly. ▲Youcandeliverflowerswithan79serviceifyourmotheris 80away. 71. 72. 73. 74. 75. 76. 77. 78. 79. 80.
Thefactorykeepsgivingoffsmoketheairdirty. A.made B.making C.tomake D.makes
In1989an8.2earthquakealmostflattedAmericakillingover30000peopleinlessthanfourminutes.Inthemiddleofcompletedamageanddisorderafatherrushedtotheschoolwherehissonwassupposedtobe21thatthebuildingwas22.Aftertheshockhe23thepromisehehadmadetohissonNomatter24I'llalwaysbethereforyou!Andtearsbeganto25hiseyes.Ashelookedatthepileofruinsitlookedhopelessbuthekeptrememberinghis26tohisson.Herushedthereandstarted27theruins. Ashewasdiggingotherhelplessparentsarrived28It'stoolate!They'vealldead!29facereality!There'snothingyoucando!Toeachparentheparentherespondedwith30Areyougoingtohelpmenow?Noonehelped.Andthenhecontinuedtodigforhissonstonebystone. Courageouslyhewentonalonebecauseheneededtoknow31Ismyboy32orishedead?Hedugforeighthours…12hours…24hours…36hours…Thenin33hourhepulledbackalargestoneandheardhisson's34.Hescreamedhisson'snameARMAND!HeheardbackDad!?!It'smeDad!Itoldtheotherkidsnottoworry.Itoldthemthatifyouwerealiveyou35meand36yousavedmethey'dbesaved.Youpromised‘NomatterwhathappensI'llalwaysbethereforyou!'YoudiditDad! What‘sgoingoninthere?thefatherasked. Thereare14ofus373833Dad.We'rescaredhungrythirstyandthankfulyou'rehere.Whenthebuildingcollapseditmade39anditsavedus. Comeoutboy! NoDad!Lettheotherkidsoutfirst40Iknowyou'llgetme!NomatterwhathappensIknowyou'llalwaysbethereforme! 21.A.onlydiscovering B.onlytodiscover C.onlyrealizing D.onlytorealize 22.A.asflatasapancake B.ashighasamountain C.asstrongasanox D.asweakasakitten 23.A.memorized B.forgot C.kept D.remembered 24.A.whathappens B.whathappen C.which D.who 25.A.fill B.fillin C.come D.burst 26.A.picture B.promise C.present D.encourage 27.A.digging B.diggingthrough C.diggingout D.digginginto 28.A.tosay B.said C.andsaying D.saying 29.A.Comeout B.Comeagain C.Comeon D.Comeoff 30.A.onenoise B.onesound C.onerow D.oneline 31.A.forhimself B.ofhimself C.byhimself D.tohimself 32.A.live B.livable C.alive D.lively 33.A.38 B.the38 C.38th D.the38th 34.A.sound B.voice C.noise D.tone 35.A.willsave B.wouldsave C.save D.wouldhavesaved 36.A.when B.because C.evenif D.though 37.A.remained B.missing C.left D.gone 38.A.for B.behind C.outof D.over 39.A.apromise B.space C.room D.atriangle 40.A.because B.though C.when D.eventhough
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IthappenedwhenIwasalittlegirl.IcanrememberneitherthebeginningnortheendbutwheneverI36ittearsflowfreelydownmyface. WhenIwasyoungmyfamilyledan37lifeinthecountry.Asyoucanimaginemanycountryroadsaredifficulttowalkon.Oneeveningwewerevisitingsomerelativesandthe38wasverybad.Itbegantorainonmywaybackhome.Dadcarriedmeonhis39.Momgaveherovercoattomy40.Wewalkedtogetherthroughtherainformorethanonehour. IwasfatatthattimeandDadmustbe41tocarrymeforsuchalongtime.Healmost42downmanytimes.Inthehopeofreducingmyfather'sburdenItriedtowalkmyselfbutIachievednothingsinceIwasjustalittlekid. Whenwearrivedhometheinsideofourhousewas43withrainwater.Therainhadcomethroughourleaky有裂缝的roofandwaterwaseverywhere. Momputbowlsandbasinsallaroundthehousetotrytocatchtherain.Thensheputmeandmyelderbrotherto44carefullyplacingusontheremaining45place.Ifellasleepsoon.WhenIopenedmyeyesIfoundDadandMomweresleepinginchairsbothhavingcaughtabadcold. Thisismyearliest46.ThoughtheeveninghaslongpassedandnowweliveahappylifeIwon'tforgettherainwewentthroughtogether.Therainthateveningandespeciallymyparents'47willstayinmymindforever. 36.A.dealwith B.thinkof C.leadto D.sufferfrom 37.A.hard B.unhappy C.interesting D.rich 38.A.food B.drink C.traffic D.weather 39.A.arm B.back C.bike D.car 40.A.brother B.sister C.friend D.relative 41.A.worried B.tired C.angry D.lazy 42.A.fell B.looked C.turned D.ran 43.A.buried B.covered C.mixed D.crowded 44.A.ground B.floor C.bed D.ceiling 45.A.dry B.clean C.beautiful D.warm 46.A.visit B.excitement C.night D.memory 47.A.wishes B.words C.love D.education
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假如你是王平几天前你和你的好朋友__在组织班级活动时因意见不一致发生了争吵当时你的态度非常粗鲁言语很伤人结果__不再理你了.现在你非常愧疚.请你给__写一封信以表达你的歉意请求他的原谅并表达继续保持友谊的愿望. 注意1.内容可以适当发挥注意行文连贯 2.开头和结尾已给出不计入总词数. DearLiQiang Iamwritingto Yourssincerely WangPing.
某科研小组给实验小鼠接种致病菌E建立了细菌性腹泻病模型并用某复方草药对其进行药效试验．结果表明该草药能增强吞噬细胞的吞噬能力并能提高IgG等抗体的分泌量．回答下列问题 1通常致病菌要入侵机体首先需要穿过的身体屏障是． 2初次接种致病菌E后进入吞噬细胞内的致病菌E可被这一细胞器处理． 3双缩脲试剂能与该腹泻病模型小鼠的血清样本产生紫色反应该现象填“能”或“不能”说明血清中含有抗致病菌E的IgG原因是．
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Mostpeoplewanttoworkbutithadbecomemoredifficultintoday'sworldtofindworkforeveryone.Theeconomy经济oftheworldneedstogrowby4%eachyearjusttokeeptheoldnumberofjobsforpeople.Oftenthisisnotpossibleandsomorepeoplearewithoutwork.Somepeoplehavenojobsnowbecausenewmachinescandotheworkofmanypeopleinashortertime.Alsomachinesdonotaskformoremoneyandlongerholidays.Inallofthecountriesoftheworldmachinesaretakingworkfrompeoplenotonlyinfactoriesbutalsoonthefarms.Onemachinecanoftendotheworkoffortypeople.About75000peoplearemovingtothecitiesadaytolookforjobsbutonly60%ofthemcanfindjobs. 28.Itwasorpeopletofindworkbeforethemachineswerewidelyusedinthefactories. A.moredifficult B.easier C.notpossible D.difficult 29.Iftheeconomyoftheworldgrowsby4%eachyear. A.peoplewillhavenojobs B.4%ofthepeoplewillhavejobstoo C.peoplecanhavethesamenumberofjobsasbefore D.96%ofthepeoplewillhavejobs 30.Howmanypeoplegointocitiestolookforjobseachday? A.Morethan75000. B.60%ofthepeople. C.About75000. D.About4%ofthepeopleintheworld. 31.WhichofthefollowingisNOTtrue? A.Mostpeoplewanttohavejobs. B.Machinesneedmoremoneyandlongerholidays. C.Nowmorepeoplearewithoutwork. D.Machinesaretakingworkinsteadofpeoplenotonlyinfactoriesbutalsoonthefarms.
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Whatisyourfavouritecolour?Doyoulikeyelloworangered?1.Doyouprefergreysandblues?Thenyouareprobablyquietshyandyouwouldratherfollowthanlead.Youtendtobepessimist.Atleastthisiswhatpsychologiststellusandtheyshouldknowbecausetheyhavebeenseriouslystudyingthemeaningofcolourpreferenceaswellastheeffectthatcolourshaveonhumanbeings2.Ifyouhappentolovebrownyoudidsoassoonasyouopenedyoureyesoratleastassoonasyoucouldseeclearly. 3.Ayellowroommakesmostpeoplefeelmorecheerfulandmorerelaxedthanadarkgreenoneandareddressbringswarmthandcheertothesaddestwinterday.4.AblackbridgeovertheThamesRivernearLondonusedtobethesceneofmoresuicides自杀thananyotherbridgeinthearea﹣﹣﹣untilitwasrepaintedgreen.Thenumberofsuicideattemptsimmediatelyfellsharply.Perhapsitwouldhavefallenevenmoreifthebridgehadbeendoneinpinkorbabyblue. 5.Itisafactthatfactoryworkersworkbetterharderandhavefeweraccidentswhentheirmachinesarepaintedorangeratherthanblackorgrey. A.Ontheotherhandblackisdepressing. B.Theytellusamongotherfactsthatwedonotchooseourfavouritecolourasgrowup﹣﹣﹣wearebornwithourpreference. C.Theroomsarepaintedindifferentcoloursasyoulike. D.Ifyoudoyoumustbeanoptimistaleaderanactivepersonwhoenjoyslifepeopleandexcitement. E.Lightandbrightcoloursmakepeoplenotonlyhappierbutmoreactive. F.Lifeislikeapictureorapoemfullofdifferentcolours. G.Coloursdoinfluenceourmoods﹣﹣﹣thereisnodoubtaboutit. 1. 2. 3. 4. 5.
用日记形式记一次有意义的旅行. 提示1.时间2014年10月16日星期天2.天气晴3.人员你班全体人员4.地点贺兰山森林公园乘车一小时到达5.活动内容记录看到的动植物野餐检验河水看看是否有污染. 注意词数100左右.
Thinkoflifeasagameinwhichyouareplayingwithfiveballsintheair.Younamethemworkfamilyhealthfriendsandspirit精神andyoukeepallofthemintheair.Youwillsoonunderstandthatworkisrubberball.Ifyoudropititwillbounce弹回back. Buttheotherfourballsfamilyhealthfriendsandspiritaremadeofglass.Ifyoudroponeofthesetheywillbebroken.Theywillneverbethesame.Youmustunderstandthatandtrytohavebalanceinyourlife.How? Don'tlookdownonyourvaluebycomparingyourselfwithothers.Itisbecausewearedifferentandeachofusisspecial. Don'tletotherpeoplesetgoalsforyou.Onlyyouknowwhatisbestforyourself. Don'tgiveupwhenyoustillhavesomethingtogive.Nothingisreallyoveruntilthemomentyoustoptrying. Don'tbeafraidofdifficulties.Itisbytakingchancesthatwelearnhowtobebrave. Don'tshutloveofoutofyourlifebysayingit'spossible.Thequickestwaytoreceiveloveistogiveitthefastestwaytoloseloveistoholdittootightthebestwaytokeeploveistogiveitwings. Don'trunthroughlifesofastthatyouforgetnotonlywhereyou'vebeenbutalsowhereyouaregoing. Don'tbeafraidtolearn.Knowledgeisatreasure珍宝youcanalwayscarryeasily. Don'tusetimeorwordscarelessly.Youcan'tgetthemback.Yesterdayishistorytomorrowismysteryandtodayisagiftthat'swhywecallitthepresent.Lifeisnotacompetitionbutatripstepbystep. 61.Thepassagetellsusnottobecauseeveryoneisspecial. A.beafraidofdifficulties B.beafraidtolearn C.runthroughlifesofast D.compareyourselfwithothers 62.ThesentenceNothingisreallyoveruntilthemomentyoustoptrying.Meansthat. A.Nothingispossible. B.ifwedon'tgiveupthereisalwayshope C.youshouldlearntogiveup D.althoughyoutrynothingwillchange 63.Whycan'tweusetimecarelessly? A.Becausetimeistooexpensive. B.Becausetimeneverreturns. C.Becausewearetoopoor. D.Becausetimewillgetback. 64.Ifyourunthroughlifesofastyouwill. A.loseyourowntreasurethatyoucanalwayscarryeasily B.loselovebyholdingittootight. C.forgetnotonlywhereyou'vebeenbutalsowhereyouaregoing D.notbeafraidofthedifficulties 65.Accordingtothepassagewhichisthebesttitle? A.Nothingisimpossible B.Glassballsareeasytobebroken C.Thingsyoucan'tdo D.Treatyourlifeinarightway.
theInternetcanbehelpfulIdon'tthinkitwisetospendtoomuchtimeonit. A.Though B.Because C.As D.If
有关蛋白质结构与功能的叙述错误的是
﹣﹣﹣Thedoorisopen.SomeonehavecomeinwhileIwasout. ﹣﹣﹣Really?Youcallthepoliceimmediately. A.mightmust B.canneed C.mustmust D.mustcan
糖耐量受损IGT的人表现为空腹血糖浓度正常负荷如饮食后血糖浓度升高异常．为了探究运动对IGT的干预情况受试者于餐后进行中等强度持续运动30min定时采样测定血糖浓度及胰岛素含量实验结果如图所示．由此分析推测错误的是
Itwasdarkcoldandwet.OnmywayhomeIcouldhearsomeone36.Thecryingwascomingfroma37boyofabout12yearsold.Hewasjustwearingaworn﹣outshirtto38himselffromthenight'scold.39enoughhewasholdingahundred﹣dollarbill.ThinkingthathehadbecomelostfromhisparentsIaskedhimwhatwas40. Hetoldmehissad41.Hesaidthathehadthreebrothersandfoursisters.Hisfatherdiedwhenhewasnineyearsold.His42waspoorlyeducatedandworkedtwopart﹣timejobs.Shemadeverylittleto43herlargefamilyhowevershehadmanagedtogive44hundreddollarstobuyherchildrensomeChristmaspresents. Theyoungboyhadbeen45byhismotheronthe46tohersecondjob.Hewastousethemoneytobuypresentsforallhisbrothersandsisters.Hehadnoteven47themallwhenanolderboyrobbedhimofoneofthetwohundred﹣dollarbillsanddisappearedintothe48Whydidn'tyoushoutforhelp?Iasked. Ididrepliedtheboy. But49cametohelpyou? Theboy50shookhisheadNoone51thatIwascrying.IwassofrightenedthatI52. ThatnightI53manyhoursbuyingpresentsforhimandhisfamilyandIalsohelpedhim54home.IjustwantedtotellhimBebravehelpwillalwayscome.Hiseyeswerefilledwithtearsandhegavemeawarmhug﹣themostexpensivegiftIhadever55.Iknewhewantedtotellmehewill. 36.A.sighing B.smiling C.crying D.whispering 37.A.poor B.bad C.kind D.careless 38.A.protect B.prevent C.separate D.benefit 39.A.Interestingly B.Personally C.Strangely D.Seriously 40.A.true B.lost C.broken D.wrong 41.A.news B.story C.result D.history 42.A.mother B.sister C.brother D.aunt 43.A.help B.treat C.support D.offer 44.A.several B.two C.one D.many 45.A.pickup B.droppedoff C.takenon D.putoff 46.A.trip B.way C.direction D.road 47.A.cleaned B.opened C.entered D.checked 48.A.dark B.room C.eye D.day 49.A.somebody B.anybody C.everybody D.nobody 50.A.sadly B.happily C.nervously D.friendly 51.A.forgot B.cared C.told D.thought 52.A.gaveoff B.gaveaway C.gaveup D.gaveout 53.A.cost B.took C.lost D.spent 54.A.back B.out C.up D.across 55.A.adopted B.received C.chosen D.accepted
2018年3月14日物理学家霍金去世他曾经患有肌肉萎缩性侧索硬化症即“渐冻症”有研究表明该病是由于突变的基因导致运动神经元合成了某种毒蛋白从而阻碍了轴突内营养物质的流动．也有最新研究结果表明利用诱导多功能干细胞IPS细胞制作前驱细胞然后移植给渐冻症实验鼠能延长其寿命．下列相关描述错误的是
toyourfriendandIamsurethatyou'llbebackplayingtogether. A.Talking B.Talked C.Talk D.Totalk
围绕“一带一路”建设位于我国西南一隅的中科院成都生物研究所构建出了一条“绿色”的“一带一路”．如图为该研究所与坦桑尼亚坦噶地方政府共建的世界上第一座大型剑麻废液沼气工程流程图请据图分析回答下列问题 1在自然生态系统中储存在剑麻体内的能量最终去向是．在人工种植的剑麻中其能量来源填“大于”“小于”或“等于”剑麻固定的全部太阳能． 2该项目有很大的发展前途可以利用剑麻废液进行沼气发电解决了废液出路问题实现了废弃资源的． 3剑麻生态系统的维持填“不需要”或“需要”人类的干预与草原生态系统相比该生态系统的抵抗力稳定性填“较强”“较弱”“相同”． 4从保护环境的角度分析该项目实施的意义是．
Longtimeagotherewasaseed种子andbecausehewasonlyaseednobodynoticedhim.Thusfeelinginferior低等的theseedgavenoimportancetohisexistence. Thenonedayawindpickedhimupandthrewhimonanopenfieldunderthesun.Laterhewasgivenrain. Yearslaterhesawatravelersittingbyhisside.ThankGodforthis.Ireallyneedsomerestheheardthetravelersay. Whatareyoutalkingabout?theseedquicklyasked.Hethoughtthemanwasmakingfunofhim.Nooneeverspoketohimlikethat. Whojustspoke?theshockedmanasked.Itisme.Aseed. Aseed?Themanlookedatthebigtree.Areyoujoking?Youarenotaseed.Youareabigtree! Really? Yes!Whyelsedoyouthinkpeoplecomehere? Whatdotheycomeherefor? Tofeelyourshade树阴!Don'ttellmeyoudidn'tknowyouhadgrownovertime. Amomentpassedbeforethetraveler'swordsbroughthimpride. Theseedthoughtandsmiledforthefirsttimeinhislife.Theyearsoftorture折磨bythesunandtherainfinallyhelpedhimgrowup. Oh!ThatmeansI'mnotalittleseedanymore!Iwasactuallyborntomakepeoplefeelcomfortable.Wow!That'sgreat! 21.Theseeddidn'trealizetheimportanceofhisexistencebecause. A.nobodylookedafterhim B.hewasthrownintotheopenair C.hewassuchasmallseed D.hedidn'tbelieveinhimself 22.Thetravelersatbytheseed'ssideto. A.escapefromtherain B.thankGodforofferinghimatree C.havearestandenjoytheshade D.talkwiththebigtree 23.Howdidtheseedfeelafterhearingthetraveler'swordsatlast? A.Sad. B.Proud. C.Funny. D.Sorry. 24.Wheredoesthepassagemostprobablycomefrom? A.Ahistorybook. B.Asciencebook. C.Astorybook. D.Anovel.
WhenIlivedinSpainsomeSpanishfriendsofminedecidedtovisitEnglandbycar.Beforetheylefttheyaskedmeforadviceabouthowtofindaccommodation住所.Isuggestedthattheyshouldstayat‘bedandbreakfast'housesbecausethiskindofaccommodationgivesaforeignvisitoragoodchancetospeakEnglishwiththefamily.Myfriendslistenedtomyadvicebuttheycamebackwithsomefunnystories. Wedidn'tstayatbedandbreakfasthousestheysaidbecausewefoundthatmostfamilieswereawayonholiday. Ithoughtthiswasstrange.FinallyIunderstoodwhathadhappened.MyfriendsspokelittleEnglishandtheythought‘VACANCIES'meant‘holidays'becausetheSpanishwordfor‘holidaysis‘vacancies'.Sotheydidnotgotohousewherethesignoutsidesaid‘VACANCLES'whichinEnglishmeanstherearefreerooms.Thenmyfriendswenttohousewherethesignsaid‘NOVACANCLES'becausetheythoughtthismeantthepeoplewhoownedthehousewerenotawayonholiday.Buttheyfoundthatthesehouseswereallfull.Asaresulttheystayedathotels! Welaughedaboutthisandaboutmistakesmyfriendsmadeinreadingothersigns.InSpanishtheword‘DIVERSION'meansfun.InEnglishitmeansthatworkmenarerepairingtheroadandthatyoumusttakeadifferentroad.Whenmyfriendssawtheword‘DIVERSION'onaroadsigntheythoughttheyweregoingtohavefun.Insteadtheroadendedinalargehold. Englishpeoplehaveproblemstoowhentheylearnforeignlanguages.OnceinParis.WhensomeoneofferedmesomemorecoffeeIsaid‘Thankyou'inFrench.ImeantthatIwouldlikesomemoreHowevertomysurprisethecoffeepotwastakenaway!LaterIfoundoutthat‘Thankyou'inFrenchmeans‘Nothankyou.' 5.MySpanishfriendswantedadviceabout. A.learningEnglish B.findingplacestostayinEngland C.drivingtheircaronEnglishroads D.goingtoEnglandbycar 6.Isuggestedthattheystayatbedandbreakfasthousesbecause. A.theywouldbeabletopracticetheirEnglish B.itwouldbemuchcheaperthanstayinginhotels C.itwouldbeconvenientforthemtohavedinner D.therewouldbenoproblemaboutfindingaccommodationthere 7.NOVACANCIESinEnglishmeans. A.nofreerooms B.freerooms C.notawayonholiday D.holidays 8.WhensomeoneofferedmemorecoffeeandIsaid‘Thankyou'inFrenchI. Adidn'treallywantanymorecoffee B.wantedthemtotakethecoffeepotaway C.reallywantedsomemorecoffee D.wantedtoexpressmypoliteness.
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